Maybe the cause is something very different.
If you have regulary flat tyres (and you don't know why) a cause can be
needles of a cactus or other plants.
In Africa, I have this problem in certain area's. You get a flat tyre weeks
afther, and months later. The needles go in the rubber, break off and
"travel" into the rubber at every turn of the wheel. Beeing pointed on one
side and sharp on the other, makes it move.
Maybe where you live there are those kind of plants....
So, maybe another set of tyres is the solution if you do not find any other
reason for your flats (apart from voodoo of course)
Alex Schaap
p.s. Locate well where the punctures are on the tube
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